DTM’s Flow Monitoring Registry (FMR) surveys people on the move at key transit points within South Sudan (SSD) and at its borders. It provides an insight into mobility trends, migration drivers and traveller profiles to inform programming by humanitarian and development partners and by the government, complementing DTM’s monitoring of COVID-19 mobility restrictions. In total, 25 Flow Monitoring Points (FMPs) were active in April 2021, surveying internal flows and cross-border travel with Uganda (UGA), the Democratic Republic of Congo (DRC), Sudan (SDN), Ethiopia (ETH) and the Central African Republic (CAR). At the beginning of April, Ariath FMP in Aweil North was relocated to Jaach, while Bentiu (Bimruok) was relocated to Bentiu (Suksita) to better capture relevant migration flows, with 23 of the 25 FMPs active at any one time. Figures are only indicative of existing trends among respondents at the active FMPs since DTM does not have full coverage of cross-border or internal flows. Participation in the survey is voluntary and anonymous.